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<td ><a href="../qtdoc/index.html">Qt 5.12</a></td><td ><a href="qtqml-index.html">Qt QML</a></td><td ><a href="qtqml-qmlmodule.html">QML Types</a></td><td >State QML 类型</td></tr></table><table class="buildversion"><tr>
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<h3><a name="toc">目录</a></h3>
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<li class="level1"><a href="#properties">属性</a></li>
<li class="level1"><a href="#signals">信号</a></li>
<li class="level1"><a href="#details">详细信息</a></li>
<li class="level2"><a href="#states-with-child-states">有子状态的状态</a></li>
<li class="level2"><a href="#example-usage">用例</a></li>
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<h1 class="title"> QML的State类型</h1>
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<p>为<a href="qml-qtqml-statemachine-statemachine.html">StateMachine</a>（状态机类型）提供通用状态。 <a href="#details">更多…</a></p>
<!-- @@@State -->
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<tr><td class="memItemLeft rightAlign topAlign"> 导入语句:</td><td class="memItemRight bottomAlign"> import QtQml.StateMachine 1.12</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign">  Qt 5.4</td></tr><tr><td class="memItemLeft rightAlign topAlign">继承自：</td><td class="memItemRight bottomAlign"> <p><a href="qml-qtqml-statemachine-qabstractstate.html">QAbstractState</a></p>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> 被继承：</td><td class="memItemRight bottomAlign"> <p><a href="qml-qtqml-statemachine-statemachine.html">StateMachine</a></p>
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<li><a href="qml-qtqml-statemachine-state-members.html"></a></li>
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<h2 id="properties">属性</h2>
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<li class="fn"><b><b><a href="qml-qtqml-statemachine-state.html#childMode-prop">childMode</a></b></b> : enumeration</li>
<li class="fn"><b><b><a href="qml-qtqml-statemachine-state.html#errorState-prop">errorState</a></b></b> : QAbstractState</li>
<li class="fn"><b><b><a href="qml-qtqml-statemachine-state.html#initialState-prop">initialState</a></b></b> : QAbstractState</li>
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<h2 id="signals">信号</h2>
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<li class="fn"><b><b><a href="qml-qtqml-statemachine-state.html#finished-signal">finished</a></b></b>()</li>
</ul>
<!-- $$$State-description -->
<a name="details"></a>
<h2 id="details">详细信息</h2>
<p>状态对象可以有子状态，也可以有到其他状态的转换。状态是<a href="qmlstatemachine.html">声明性状态机</a>框架的一部分。</p>
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<h2 id="states-with-child-states">有子状态的状态</h2>
<p><a href="qml-qtqml-statemachine-state.html#childMode-prop">childMode</a> 属性决定如何处理子状态。对于非并行状态组，必须使用<a href="qml-qtqml-statemachine-state.html#initialState-prop">initialState</a>属性设置初始状态。子状态是相互排斥的状态，当父状态是转换的目标时，状态机需要知道要进入哪个子状态。</p>
<p>当输入最后一个子状态(<a href="qml-qtqml-statemachine-finalstate.html">FinalState</a>)时，状态发出<a href="qml-qtqml-statemachine-state.html#finished-signal">State::finished()</a>信号。</p>
<p><a href="qml-qtqml-statemachine-state.html#errorState-prop">errorState</a>设置状态的错误状态。错误状态是状态机在试图进入状态时检测到错误时将转换到的状态(例如，因为没有设置初始状态)。</p>
<a name="example-usage"></a>
<h2 id="example-usage">用例</h2>
<pre class="qml">

  import QtQuick 2.0
  import QtQml.StateMachine 1.0 as DSM

  <span class="type"><a href="../qtquick/qml-qtquick-rectangle.html">Rectangle</a></span> {
      <span class="type">DSM</span>.StateMachine {
          <span class="name">id</span>: <span class="name">stateMachine</span>
          <span class="name">initialState</span>: <span class="name">state</span>
          <span class="name">running</span>: <span class="number">true</span>
          <span class="type">DSM</span>.State {
              <span class="name">id</span>: <span class="name">state</span>
          }
      }
  }

</pre>
<br style="clear: both" /><p><b>参见</b><a href="qml-qtqml-statemachine-statemachine.html">StateMachine</a> 和 <a href="qml-qtqml-statemachine-finalstate.html">FinalState</a>。</p>
<!-- @@@State -->
<h2>属性文档</h2>
<!-- $$$childMode -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="childMode-prop">
<td class="tblQmlPropNode"><p>
<a name="childMode-prop"></a><span class="name">childMode</span> : <span class="type"><a href="qml-enumeration.html">enumeration</a></span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>此状态的子模式</p>
<p>此属性的默认值是<a href="../qtcore/qstate.html">QState</a>.ExclusiveStates。</p>
<p>此枚举指定如何处理一个状态的子状态：</p>
<ul>
<li><a href="../qtcore/qstate.html">QState</a>.ExclusiveStates 子状态是互斥的，必须通过设置<a href="qml-qtqml-statemachine-state.html#initialState-prop">initialState</a>、属性来设置初始状态。</li>
<li><a href="../qtcore/qstate.html">QState</a>.ParallelStates 子状态是平行的。当输入父状态时，它的所有子状态都是并行输入的。</li>
</ul>
</div></div><!-- @@@childMode -->
<br/>
<!-- $$$errorState -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="errorState-prop">
<td class="tblQmlPropNode"><p>
<a name="errorState-prop"></a><span class="name">errorState</span> : <span class="type"><a href="qml-qtqml-statemachine-qabstractstate.html">QAbstractState</a></span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>该状态的错误状态。</p>
</div></div><!-- @@@errorState -->
<br/>
<!-- $$$initialState -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="initialState-prop">
<td class="tblQmlPropNode"><p>
<a name="initialState-prop"></a><span class="name">initialState</span> : <span class="type"><a href="qml-qtqml-statemachine-qabstractstate.html">QAbstractState</a></span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>此状态(其子状态之一)的初始状态。</p>
</div></div><!-- @@@initialState -->
<br/>
<h2>信号文档</h2>
<!-- $$$finished -->
<div class="qmlitem"><div class="qmlproto">
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<tr valign="top" class="odd" id="finished-signal">
<td class="tblQmlFuncNode"><p>
<a name="finished-signal"></a><span class="name">finished</span>()</p></td></tr>
</table></div>
</div><div class="qmldoc"><p>当进入此状态的最终子状态时，将发出此信号。</p>
<p>相应的处理程序是<code>onFinished</code>。</p>
<p><b>参见</b><a href="qml-qtqml-statemachine-qabstractstate.html#active-prop">QAbstractState::active</a>, <a href="qml-qtqml-statemachine-qabstractstate.html#entered-signal">QAbstractState::entered</a>和  <a href="qml-qtqml-statemachine-qabstractstate.html#exited-signal">QAbstractState::exited</a>。</p>
</div></div><!-- @@@finished -->
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